I've been deveoping an android app (using ChatGPT - I have no real android development knowledge!) which animates a dog's mouth through the camera feed. I had the app working okay but with some latency between the camera feed and the overlay (using CameraX and a PreviewView), so I tried to update it to an offscreen rendering approach, using an EGL context and MediaCodec surface to render the camera feed plus overlays into a single composited output.
However, the I have not implemented this correclty and the camera feed is just showing a black screen.
Here's ChatGPT's summary of what we had originally (working) and what we changed it to. Both of these approaches are saved on different github branches which you will have access to. You can see the previously working version on the master branch, and the newly updated (not working) version on a test branch.
What We Had Originally - An Android app (Kotlin) using CameraX and a PreviewView to display the live camera feed. - A BoundingBoxOverlay custom View drawn on top for YOLO pose detection (dog’s mouth, eyes, etc.). - We wanted to animate the dog’s mouth in sync with audio but were limited by the traditional overlay.
What We Changed It To Offscreen Rendering Approach: - Created an EGL context and MediaCodec surface (via OffscreenRenderer.kt) to render the camera feed plus overlays into a single composited output. - The camera feed is now provided by a SurfaceTexture created from an external OES texture (rather than using PreviewView). - CameraX is configured to output frames to that SurfaceTexture. - A custom pipeline composites the camera and any overlays (animated mouth, etc.) in OpenGL, then encodes to a video file with MediaCodec.
What We’re Trying to Achieve A Snapchat-like pipeline: - Grab the camera feed directly via a SurfaceTexture (external OES texture). - Apply real-time overlays/filters (like mouth animation, hats, glasses) in OpenGL. - Composite everything offscreen and encode it into a video file (for recording). - Avoid the performance constraints of standard Android Views by relying on OpenGL compositing (similar to Snapchat filters).
Despite these changes, the feed currently displays a black screen. We suspect an issue with the GL pipeline, resolution mismatch, or camera frames not drawing as intended.
Goal: Fix the offscreen renderer so that camera frames plus overlays appear in real time, and video recording also works as expected.
Facebook Instagram Traffic Lead Campaign Category: Digital Marketing, Facebook Ads, Facebook Marketing, Google Adwords, Instagram Ads, Internet Marketing, Lead Generation, Social Media Marketing Budget: ₹1500 - ₹12500 INR
Creación de Video Publicitario para Eventos Category: Adobe Premiere Pro, After Effects, Social Media Marketing, Video Ads, Video Editing, Video Production, Video Services, Videography Budget: $10 - $30 USD
Tối ưu Wix Studio hiện có Category: CSS, Graphic Design, HTML, SEO, Web Design, Web Development, Website Optimization, Wix Budget: $30 - $250 USD
22-May-2026 16:00 GMT
New Website or App Development Category: Angular, App Development, Backend Development, Frontend Development, UI / User Interface, UX / User Experience, Vue.js, Web Development Budget: $15 - $25 USD
22-May-2026 15:58 GMT
Radio PCB Design for Prototyping Category: Circuit Design, Electrical Engineering, Electronic Design, Electronics, Embedded Systems, PCB Layout, Prototyping, Signal Processing Budget: $30 - $250 CAD
Will Contestation Legal Assistance Category: Contracts, Family Law, Legal, Legal Analysis, Legal Consultation, Legal Research, Legal Writing, Litigation, Property Law Budget: £250 - £750 GBP
22-May-2026 15:55 GMT
Grafický návrh certifikátu kvality Category: Adobe Illustrator, Adobe InDesign, Photoshop, Graphic Design, Logo Design, Print Design, Typography Budget: €30 - €250 EUR
22-May-2026 15:55 GMT
Informative Health Wellness Blog Articles Category: Article Rewriting, Article Writing, Blog, Blog Writing, Content Writing, Health, Medical Writing, Research Budget: £250 - £750 GBP